This is the electronic viewfinder especially for the GXR, with 920,000 dots equivalent, the field of view is 100%. It attaches to the hot shoe that is located above the lens.e
Another useful accessory the GXR has to offer is the VF-2 electronic viewfinder which can be plugged in to the camera. Even with a large bright 3" LCD screen, in certain lighting conditions, a viewfinder will offer the clearest option. Simply alternate between viewfinder and LCD screen via the pressing of a button. The angle of the VF-2 is also adjustable for optimum eye position.
In the future...
It's worth remembering that this is a new, evolving system - with more lens modules and accessories curently under development, who know's what is round the corner - possibly a dedicated digiscoping module!